Work locating indicator for jig boring machines



Nov. 9, 1937. J. M. RUSNAK 2,098,838

WORK LOCATING INDICATOR FOR JIG BORING MACHINES Filed Sept. 17, 1935 INVENT JMHusn ATTOREY Patented New 9, 1 937 Wonk L'ocarme INDICATOR for? 116;-

nonmcnrncnmns" a q .iohn M. Busnak, assignor; 4 by meme to NiIcs Bement-Pond Company, New Ion-h, N. Y., a

New Jersey pplication 11 ,193 5,'s er|a1 ri 40.955 V. 2' k (cl. 33-" 11:) This invention relates to an improved locating or setting device for work pieces imprecision 'boring; and other metal cutting tools.

A primary object of the invention is toprovide a universal setting or locating device adapted for temporary attachment to' the spindle of a jig borer or other machine .tool having a rotating tool or cutter spindle which will enable a work piece to be accurately located with respect to the axis of a tool rotating spindle. 7 One feature which enables me to accomplish the above named object is that the device is adapted to be secured within the tool receiving portion of a rotating spindle and'is provided with a guideway extending transversely relative to the axis of the spindle upon which a sensitive indicator may be mounted at adjustablejdistances from the axis of rotation of the spindle.

- Another feature of importance of the invention drawing.

In the accompanying annexed hereto and forming a partofthis specification I have shown my invention attached to and being used. in a precision boring machine of the vertical type,

' but-it will; be understood that the invention can be. otherwise embodied and that the drawing is not to be construedas defining or iimitingfihe scope of the inventiomthe'claims appended to this specification relied-upon forthat pur- Inthedrawing'z' Figure 1 is a side elevation of a complete device shown applied to the spindle of a vertical boring machine and engaging an internal surface of a work piece mounted upon the ,work supporting table forming part of the boring-machine.

lFig. 2 is a plan view of the device removed from the spindle of the boring machine; and

Fig. 3 is aside elevation partly in section and showing the parts. disposed at rightangles from the position shown in-Fig 1. 3 L In the above mentioned drawing I have shown but one embodiments! the invention which is now thought prererabie; but it is to be understood'that changes and modiflcationsmay be made within the scope of the,-appended claims 'Briefly and in a preferred mv invention may include the following principal First, a" tapered shank adapted'to fit and be-frictiohally within the tool recess of a. boring machine spindle; "second, abody memberflxedly mounted 'upon a portion of the shank andhaving guideways extendingin a direction transversely of-the-axis of the spindle in which the's'hank is mounted; third, a'head member movable upon the ways formed on -the body member; fourth,

. clamping means for the head along the guideways of the body member; fifth,a lever mounted for oscillation upon a horizontal axis within said head and adapted at its lower extendedportion to contact a portion of the work piece .being located; and sixth, a dial indicator sediired in fixed podtion upon the head and having its aetuating spindle engaging against the extended upper end of the pivotally mounted lever.

In the operation of boring holes at extremely precise distances one from another as in jigs and fixtures for metal parts made in large numbers,

it is essential-that the work be initially positioned accurately with respect to .the entire groupnf holes. 7 One hole or projection previously formed however, be employed-as .a reference from' which the remaining holes of the group, may helm cated; The present invention provides-a convenient and eflicient means-for preliminarily loeating a work piece relative to the spindle of a boring machine from an initial reference surface to properly locate the work piece for ai'series of subsequent operations.

Referring more in detail drawing, .there is shown at ll the spindle of a to the figures of the boring or drilling machine rotatable within a sleeve ll. These partsmay'be similarto corresponding parts employed'in the patent to Hanson 1323,26! granted December 2, 1919. It will be imderstood also that means to rotate the spindle II are provided and to also raise and lower the spindle II and sleeve ll relative to the work support l2. As the headstock and other parts of the boring machine form no part of the present invention they are not shown.

within the tool receiving socket of therebeingabodymemberllsecuredri'gidly Anymeansmaybeemployedtoretain the shank li-within the wt of the spindle II,

I the spindle II is mountedthe shank I3 01' the setting d vice,

usually, however, friction between the being ample for that purpose.

On the body member I of the setting device are laterally extending guideways II along which 1 may be adjusted a head I carrying indicating,

means i'or work pieces being positioned. The guideways I! extend horizontally and in oppo site directionsso that the positioning head I .is

' adjustable in a direction normal to the axis oi and on either side of the'spindle ll; Preferably and as shown, the shank l3 and body portion ll are separate members and are securely fastened permanently .together. shank llhasacylindrical extension ll fitting within a central opening in the body member ll.

A nut l8 retains the body member in position 1 and in addition a. taper pin I 9 may-be provided to rigidly retain the body member in secured position relative to the shank. I 4

Adjustable along the guideways II of the member I4 is the indicating head ll adapted to be secured in any adjusted position alongwthe ways l5 as by a clamping screw 20. Thehead ll has mounted thereon a lever 2| centrally pivotally supported so that it may swing about a horizontal axis. In order that this lever,2l may swing with minimum possible friction conical bearings are provided on the ends 01' oppositely extending screws 22, the ends engaging conical recesses in the hub or central portion 01' the oscillating lever 2|.

Also mounted on the head. It is an indicator 2 preferably of the dial typehaving an axially movable spindle extending therefrom by means of which the pointer 26 of the .indicator may be actuated. The iorwardsend of this spindle 25 engages againsta side face at the upper end of then rotated slowly preferably by hand and osci1- lations of'the lever are observed by movementslofj surfaces a is made it necessaryto assure contact between For. that purpose-the the pointer. Adjustment laterally oi the I the lever 2l and suriace oi" the work piece W throughoiit the rotation of the device about the work piece. Successive adjustments oi the work piece W may bemade by the. adjusting means therefore (not shown) until the. work piece is in position with the surface engaged by the lever 2| exactly, in alignment with the axis of the spindle ".3 Thisposition will be indicated by the indicator pointer 28 remaining in the same position on the dial throughout a complete rotation of the device with the lever 2i in contact with the work piece. with the work positioned as above areierence suri'zicehas been established from which other miles maybe bored at any predetermined distancestherei'rqm'.

'WhatIclaimisz- '1. A setting device for boring machine work ,supportscomprislng in combination, a body'member'adapted for mounting upon the spindle of said machine, a single piece-head on said body mem- I ber adjustable in a direction normal to the axis 3 of rotation of said spindle, an indicator having its body member detachably fixed to said head, and a centrally pivoted lever mounted for oscillation- 'upon bearings within said head-about an ,axis

normal to the. axis of said spindle, said lever at.-

its lower 'endbeing adapted to engage a surface of the work piece being positioned and at its upper end' engaging the actuating member-bf,

saidindicator. .2. A settingdevice for ber adapted for mounting upon the spindle of said machine, a single piece head adjustable on said boring machine work,. supports comprising in combination, abody membody member in a direction normal to ,the axis of the spindle, an indicator having a movable pointer and having its body portion detachably secured directly to said head, and a lever pivotally mounted centrally of its length upon bearings within said head for movement about an axis normal to the axis oi rotation of said spindle, said lever being adapted to'engagea surface of a work piece being positioned at one end and having its opposite end in contact with the actuating member of said'indicator, whereby-oscilla tion oi said lever will vary the position o! the indicator pointer.

aorm u, RUSNAK. 

